diff --git a/README.md b/README.md
index 70ffe3e..6da464c 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,10 @@
 
 Deno IO methods as valid Task monads perfect to write great point-free software in JavaScript.
 
-[![deno land](http://img.shields.io/badge/available%20on-deno.land/x-lightgrey.svg?logo=deno&labelColor=black)](https://deno.land/x/functional-deno-io@v0.3.2)
-[![deno version](https://img.shields.io/badge/deno-^1.3.2-lightgrey?logo=deno)](https://github.com/denoland/deno)
-[![GitHub release](https://img.shields.io/github/v/release/sebastienfilion/functional-deno-io)](https://github.com/sebastienfilion/functional-deno-io/releases)
-[![GitHub licence](https://img.shields.io/github/license/sebastienfilion/functional-deno-io)](https://github.com/sebastienfilion/functional-deno-io/blob/v0.1.0/LICENSE)
+[![deno land](http://img.shields.io/badge/available%20on-deno.land/x-lightgrey.svg?logo=deno&labelColor=black)](https://deno.land/x/functional_io@v1.0.0)
+[![deno version](https://img.shields.io/badge/deno-^1.5.4-lightgrey?logo=deno)](https://github.com/denoland/deno)
+[![GitHub release](https://img.shields.io/github/v/release/sebastienfilion/functional-io)](https://github.com/sebastienfilion/functional-io/releases)
+[![GitHub licence](https://img.shields.io/github/license/sebastienfilion/functional-io)](https://github.com/sebastienfilion/functional-io/blob/v1.0.0/LICENSE)
 
   * [Buffer](#buffer)
   * [Directory](#directory)
@@ -25,11 +25,11 @@ library that implements the [Fantasy-land specifications](https://github.com/fan
 
 ```js
 import { compose, chain, curry } from "https://x.nest.land/ramda@0.27.0/source/index.js";
-import Either from "https://deno.land/x/functional@v1.0.0/library/Either.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
-import Buffer from "https://deno.land/x/functional_io@v0.4.2/library/Buffer.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import { close, writeAll, create } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
+import Either from "https://deno.land/x/functional@v1.2.1/library/Either.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
+import Buffer from "https://deno.land/x/functional_io@v1.0.0/library/Buffer.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import { close, writeAll, create } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
 
 const writeNewFile = curry(
   (buffer, destinationFile) =>
@@ -300,9 +300,9 @@ Change the current working directory to the specified path.
 `chdir :: Directory a -> Task e Directory a`
 
 ```js
-import { chdir } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Directory from "https://deno.land/x/functional_io@v0.4.2/library/Directory.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { chdir } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Directory from "https://deno.land/x/functional_io@v1.0.0/library/Directory.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = chdir(Directory(".."));
 
@@ -316,9 +316,9 @@ Changes the permission of a specific file/directory of specified path. Ignores t
 `chmod :: Number -> Location a -> Task e Location a`
 
 ```js
-import { chmod } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { chmod } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = chmod(0o000, File.fromPath(`${Deno.cwd()}/hoge`));
 
@@ -332,9 +332,9 @@ Change owner of a regular file or directory. This functionality is not available
 `chown :: Number -> Number -> Location a -> Task e Location a`
 
 ```js
-import { chown } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { chown } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = chown(null, null, File.fromPath(`${Deno.cwd()}/hoge`));
 
@@ -349,9 +349,9 @@ Closing a file when you are finished with it is important to avoid leaking resou
 `close :: File a -> Task e File a`
 
 ```js
-import { close } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { close } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = close(File(`${Deno.cwd()}/hoge`, new Uint8Array([]), 3));
 
@@ -365,9 +365,9 @@ Copies from a source to a destination until either EOF (null) is read from the s
 `copy :: Options -> Buffer a -> Buffer b -> Task e Buffer a`
 
 ```js
-import { copy } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Buffer from "https://deno.land/x/functional_io@v0.4.2/library/Buffer.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { copy } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Buffer from "https://deno.land/x/functional_io@v1.0.0/library/Buffer.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = copy({}, Buffer(new Uint8Array([ 65, 66, 67, 68, 69 ])), Buffer(new Uint8Array([])));
 
@@ -382,9 +382,9 @@ else overwriting. Fails if target path is a directory or is unwritable.
 `copyFile :: File a -> File b -> Task e File b`
 
 ```js
-import { copyFile } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { copyFile } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = copyFile(File.fromPath(`${Deno.cwd()}/hoge`), File.fromPath(`${Deno.cwd()}/piyo`));
 
@@ -398,9 +398,9 @@ Creates a file if none exists or truncates an existing file.
 `create :: File a -> Task e File a`
 
 ```js
-import { create } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { create } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = create(File.fromPath(`${Deno.cwd()}/hoge`));
 
@@ -414,15 +414,15 @@ Return a Directory representation of the current working directory.
 `cwd :: () -> Task e Directory a`
 
 ```js
-import { cwd } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { cwd } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = cwd();
 
 assert(Task.is(container));
 ```
 
-### `emptyDir` [📕](https://deno.land/std@0.68.0/fs#emptydir)
+### `emptyDir` [📕](https://deno.land/std@0.79.0/fs#emptydir)
 
 Ensures that a directory is empty. Deletes directory contents if the directory is not empty.
 If the directory does not exist, it is created. The directory itself is not deleted.
@@ -430,32 +430,32 @@ If the directory does not exist, it is created. The directory itself is not dele
 `emptyDir :: Directory a -> Task e Directory a`
 
 ```js
-import { emptyDir } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Directory from "https://deno.land/x/functional_io@v0.4.2/library/Directory.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { emptyDir } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Directory from "https://deno.land/x/functional_io@v1.0.0/library/Directory.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = emptyDir(Directory(`${Deno.cwd()}/hoge`));
 
 assert(Task.is(container));
 ```
 
-### `ensureDir` [📕](https://deno.land/std@0.68.0/fs#ensuredir)
+### `ensureDir` [📕](https://deno.land/std@0.79.0/fs#ensuredir)
 
 Ensures that the directory exists. If the directory structure does not exist, it is created. Like `mkdir -p`.
 
 `ensureDir :: Directory a -> Task e Directory a`
 
 ```js
-import { ensureDir } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Directory from "https://deno.land/x/functional_io@v0.4.2/library/Directory.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { ensureDir } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Directory from "https://deno.land/x/functional_io@v1.0.0/library/Directory.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = emptyDir(Directory(`${Deno.cwd()}/hoge`));
 
 assert(Task.is(container));
 ```
 
-### `exists` [📕](https://deno.land/std@0.68.0/fs#exists)
+### `exists` [📕](https://deno.land/std@0.79.0/fs#exists)
 
 Test whether the given path exists by checking with the file system. 
 If the file or directory doesn't exist, it will resolve to `Either.Left(null)`.
@@ -463,41 +463,41 @@ If the file or directory doesn't exist, it will resolve to `Either.Left(null)`.
 `exists :: Location a -> Task null Location a`
 
 ```js
-import { exists } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Directory from "https://deno.land/x/functional_io@v0.4.2/library/Directory.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { exists } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Directory from "https://deno.land/x/functional_io@v1.0.0/library/Directory.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = exists(Directory(`${Deno.cwd()}/hoge`));
 
 assert(Task.is(container));
 ```
 
-### `mkdir` [📕](https://deno.land/std@0.68.0/fs#mkdir)
+### `mkdir` [📕](https://deno.land/std@0.79.0/fs#mkdir)
 
 Creates a new directory with the specified path.
 
 `mkdir :: Options -> Directory a -> Task e Directory a`
 
 ```js
-import { mkdir } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Directory from "https://deno.land/x/functional_io@v0.4.2/library/Directory.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { mkdir } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Directory from "https://deno.land/x/functional_io@v1.0.0/library/Directory.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = mkdir({}, Directory(`${Deno.cwd()}/hoge`));
 
 assert(Task.is(container));
 ```
 
-### `move` [📕](https://deno.land/std@0.68.0/fs#move)
+### `move` [📕](https://deno.land/std@0.79.0/fs#move)
 
 Moves a file or directory.
 
 `move :: Options -> String -> Location a -> Task e Location b`
 
 ```js
-import { move } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Directory from "https://deno.land/x/functional_io@v0.4.2/library/Directory.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { move } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Directory from "https://deno.land/x/functional_io@v1.0.0/library/Directory.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = move({}, `${Deno.cwd()}/piyo`, Directory(`${Deno.cwd()}/hoge`));
 
@@ -512,9 +512,9 @@ createNew open options. It is the callers responsibility to close the file when
 `open :: Options -> File a -> Task e File a`
 
 ```js
-import { open } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Directory from "https://deno.land/x/functional_io@v0.4.2/library/Directory.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { open } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Directory from "https://deno.land/x/functional_io@v1.0.0/library/Directory.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = open({ read: true, write: true }, File.fromPath(`${Deno.cwd()}/hoge`));
 
@@ -528,9 +528,9 @@ Read from a Resource given it has a non-zero raw buffer.
 `read :: Resource a -> Task e Resource a`
 
 ```js
-import { read } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { read } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = read(File(`${Deno.cwd()}/hoge`, new Uint8Array(5), 3));
 
@@ -544,10 +544,10 @@ Read from a Resource.
 `readAll :: Resource a -> Task e Resource a`
 
 ```js
-import { readAll } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Buffer from "https://deno.land/x/functional_io@v0.4.2/library/Buffer.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { readAll } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Buffer from "https://deno.land/x/functional_io@v1.0.0/library/Buffer.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = readAll(File(`${Deno.cwd()}/hoge`, new Uint8Array([]), 3));
 
@@ -561,9 +561,9 @@ Renames a file or directory.
 `rename :: String -> Location a -> Task e Location b`
 
 ```js
-import { rename } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Directory from "https://deno.land/x/functional_io@v0.4.2/library/Directory.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { rename } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Directory from "https://deno.land/x/functional_io@v1.0.0/library/Directory.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = rename(`${Deno.cwd()}/piyo`, Directory(`${Deno.cwd()}/hoge`));
 
@@ -577,9 +577,9 @@ Write to a Resource given it has a non-zero raw buffer.
 `write :: Resource a -> Task e Resource a`
 
 ```js
-import { write } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { write } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = write(
   File(`${Deno.cwd()}/hoge`, new Uint8Array([ 65, 66, 67, 68, 69 ]), _file.rid)
@@ -595,10 +595,10 @@ Write all to a Resource from a Buffer.
 `writeAll :: Buffer b -> Resource a -> Task e Resource b`
 
 ```js
-import { writeAll } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Buffer from "https://deno.land/x/functional_io@v0.4.2/library/Buffer.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { writeAll } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Buffer from "https://deno.land/x/functional_io@v1.0.0/library/Buffer.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = writeAll(
   Buffer(new Uint8Array([ 65, 66, 67, 68, 69 ])),
@@ -615,10 +615,10 @@ Write a File to the file system.
 `writeFile :: Options -> File a -> Task e File b`
 
 ```js
-import { writeFile } from "https://deno.land/x/functional_io@v0.4.2/library/fs.js";
-import Buffer from "https://deno.land/x/functional_io@v0.4.2/library/Buffer.js";
-import File from "https://deno.land/x/functional_io@v0.4.2/library/File.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { writeFile } from "https://deno.land/x/functional_io@v1.0.0/library/fs.js";
+import Buffer from "https://deno.land/x/functional_io@v1.0.0/library/Buffer.js";
+import File from "https://deno.land/x/functional_io@v1.0.0/library/File.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const container = writeFile(
   {},
@@ -637,10 +637,10 @@ Fetches a resource on a local/remote server.
 `fetch :: Request a -> Task e Response b`
 
 ```js
-import { fetch } from "https://deno.land/x/functional_io@v0.4.2/library/browser-safe.js";
-import Request from "https://deno.land/x/functional_io@v0.4.2/library/Request.js";
-import Response from "https://deno.land/x/functional_io@v0.4.2/library/Response.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { fetch } from "https://deno.land/x/functional_io@v1.0.0/library/browser-safe.js";
+import Request from "https://deno.land/x/functional_io@v1.0.0/library/Request.js";
+import Response from "https://deno.land/x/functional_io@v1.0.0/library/Response.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 const containerA = fetch(Request.GET("http://localhost:8000"));
 
diff --git a/library/Buffer.js b/library/Buffer.js
index 7732d9c..1b9d00a 100644
--- a/library/Buffer.js
+++ b/library/Buffer.js
@@ -1,8 +1,7 @@
-import { factorizeType } from "https://deno.land/x/functional@v1.0.0/library/factories.js";
-import { $$type } from "https://deno.land/x/functional@v1.0.0/library/Symbols.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
-
-export const Buffer = factorizeType("Buffer", [ "raw" ]);
+import { curry } from "https://x.nest.land/ramda@0.27.0/source/index.js";
+import { factorizeType } from "https://deno.land/x/functional@v1.2.1/library/factories.js";
+import { $$type } from "https://deno.land/x/functional@v1.2.1/library/Symbols.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 /**
  * The `Buffer` is the most basic type; it only has one attribute which is a typed array named "raw".
@@ -22,6 +21,8 @@ export const Buffer = factorizeType("Buffer", [ "raw" ]);
  * ```
  */
 
+export const Buffer = factorizeType("Buffer", [ "raw" ]);
+
 Buffer.prototype.ap = Buffer.prototype["fantasy-land/ap"] = function (container) {
 
   return Buffer.of(container.raw(this.raw));
@@ -92,4 +93,6 @@ Buffer.prototype.map = Buffer.prototype["fantasy-land/map"] = function (unaryFun
 
 Buffer.of = Buffer.prototype.of = Buffer.prototype["fantasy-land/of"] = buffer => Buffer(buffer);
 
+export const factorizeBuffer = curry(Buffer);
+
 export default Buffer;
diff --git a/library/Buffer_test.js b/library/Buffer_test.js
index 8b4d067..bd046ff 100644
--- a/library/Buffer_test.js
+++ b/library/Buffer_test.js
@@ -1,4 +1,4 @@
-import { assert, assertEquals } from "https://deno.land/std@0.70.0/testing/asserts.ts";
+import { assert, assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 
 import Buffer from "./Buffer.js";
 
diff --git a/library/Directory.js b/library/Directory.js
index d6f823a..b8c67b5 100644
--- a/library/Directory.js
+++ b/library/Directory.js
@@ -1,7 +1,7 @@
-import { factorizeType } from "https://deno.land/x/functional@v1.0.0/library/factories.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { factorizeType } from "https://deno.land/x/functional@v1.2.1/library/factories.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
-import { $$type } from "https://deno.land/x/functional@v1.0.0/library/Symbols.js";
+import { $$type } from "https://deno.land/x/functional@v1.2.1/library/Symbols.js";
 
 /**
  * The `Directory` type represents a directory on the file system. It is the only type with the same shape as `URL`.
diff --git a/library/Directory_test.js b/library/Directory_test.js
index eae212c..eef66cc 100644
--- a/library/Directory_test.js
+++ b/library/Directory_test.js
@@ -1,4 +1,4 @@
-import { assert, assertEquals } from "https://deno.land/std@0.70.0/testing/asserts.ts";
+import { assert, assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 
 import Directory from "./Directory.js";
 
diff --git a/library/File.js b/library/File.js
index 479b052..0ccf4ce 100644
--- a/library/File.js
+++ b/library/File.js
@@ -1,7 +1,7 @@
-import { factorizeType } from "https://deno.land/x/functional@v1.0.0/library/factories.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { factorizeType } from "https://deno.land/x/functional@v1.2.1/library/factories.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
-import { $$type } from "https://deno.land/x/functional@v1.0.0/library/Symbols.js";
+import { $$type } from "https://deno.land/x/functional@v1.2.1/library/Symbols.js";
 
 /**
  * The `File` type extends the `Resource` type. It represents a file with a path.
diff --git a/library/FileSystemCollection.js b/library/FileSystemCollection.js
index 994710d..ce1dbee 100644
--- a/library/FileSystemCollection.js
+++ b/library/FileSystemCollection.js
@@ -1,6 +1,6 @@
-import { factorizeType } from "https://deno.land/x/functional@v1.0.0/library/factories.js";
+import { factorizeType } from "https://deno.land/x/functional@v1.2.1/library/factories.js";
 
-import { $$value } from "https://deno.land/x/functional@v1.0.0/library/Symbols.js";
+import { $$value } from "https://deno.land/x/functional@v1.2.1/library/Symbols.js";
 
 /**
  * The `FileSystemCollection` is represents a collection of `Location`, namely of `Directory` and `File`. This of it
diff --git a/library/FileSystemCollection_test.js b/library/FileSystemCollection_test.js
index 71d59d9..1c344ee 100644
--- a/library/FileSystemCollection_test.js
+++ b/library/FileSystemCollection_test.js
@@ -1,4 +1,4 @@
-import { assertEquals } from "https://deno.land/std@0.70.0/testing/asserts.ts";
+import { assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 
 import FileSystemCollection from "./FileSystemCollection.js";
 import File from "./File.js";
diff --git a/library/File_test.js b/library/File_test.js
index 6840344..2dec035 100644
--- a/library/File_test.js
+++ b/library/File_test.js
@@ -1,4 +1,4 @@
-import { assert, assertEquals } from "https://deno.land/std@0.70.0/testing/asserts.ts";
+import { assert, assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 
 import File from "./File.js";
 
diff --git a/library/Request.js b/library/Request.js
index b9204b4..8c613cc 100644
--- a/library/Request.js
+++ b/library/Request.js
@@ -1,6 +1,6 @@
 import { curry } from "https://x.nest.land/ramda@0.27.0/source/index.js";
 
-import { factorizeType } from "https://deno.land/x/functional@v1.0.0/library/factories.js";
+import { factorizeType } from "https://deno.land/x/functional@v1.2.1/library/factories.js";
 
 /**
  * The `Request` represent a HTTP request.
diff --git a/library/Request_test.js b/library/Request_test.js
index caa65f3..143af69 100644
--- a/library/Request_test.js
+++ b/library/Request_test.js
@@ -1,4 +1,4 @@
-import { assert, assertEquals } from "https://deno.land/std@0.65.0/testing/asserts.ts";
+import { assert, assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 
 import Request from "./Request.js";
 
diff --git a/library/Resource.js b/library/Resource.js
index b9d138b..dd77215 100644
--- a/library/Resource.js
+++ b/library/Resource.js
@@ -1,7 +1,8 @@
-import { factorizeType } from "https://deno.land/x/functional@v1.0.0/library/factories.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { curry } from "https://x.nest.land/ramda@0.27.0/source/index.js";
+import { factorizeType } from "https://deno.land/x/functional@v1.2.1/library/factories.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
-import { $$type } from "https://deno.land/x/functional@v1.0.0/library/Symbols.js";
+import { $$type } from "https://deno.land/x/functional@v1.2.1/library/Symbols.js";
 
 /**
  * The `Resource` type extends the `Buffer` type. It represents a system resource with a handle, eg: STDOUT, STDIN or a
@@ -103,4 +104,6 @@ Resource.prototype.map = Resource.prototype["fantasy-land/map"] = function (unar
 
 Resource.of = Resource.prototype.of = Resource.prototype["fantasy-land/of"] = raw => Resource(raw, 0);
 
+export const factorizeResource = curry(Resource);
+
 export default Resource;
diff --git a/library/Resource_test.js b/library/Resource_test.js
index c228da7..4bc1b2e 100644
--- a/library/Resource_test.js
+++ b/library/Resource_test.js
@@ -1,4 +1,4 @@
-import { assert, assertEquals } from "https://deno.land/std@0.70.0/testing/asserts.ts";
+import { assert, assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 
 import Resource from "./Resource.js";
 
diff --git a/library/Response.js b/library/Response.js
index b065526..357a2e9 100644
--- a/library/Response.js
+++ b/library/Response.js
@@ -1,6 +1,6 @@
 import { curry } from "https://x.nest.land/ramda@0.27.0/source/index.js";
 
-import { factorizeSumType } from "https://deno.land/x/functional@v1.0.0/library/factories.js";
+import { factorizeSumType } from "https://deno.land/x/functional@v1.2.1/library/factories.js";
 
 /**
  * The `Response` represent a HTTP response.
diff --git a/library/Response_test.js b/library/Response_test.js
index 3f9a608..38270b4 100644
--- a/library/Response_test.js
+++ b/library/Response_test.js
@@ -1,4 +1,4 @@
-import { assert, assertEquals } from "https://deno.land/std@0.65.0/testing/asserts.ts";
+import { assert, assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 
 import Response from "./Response.js";
 
diff --git a/library/URL.js b/library/URL.js
index c6ba29c..5a15bb2 100644
--- a/library/URL.js
+++ b/library/URL.js
@@ -1,7 +1,7 @@
-import { factorizeType } from "https://deno.land/x/functional@v1.0.0/library/factories.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import { factorizeType } from "https://deno.land/x/functional@v1.2.1/library/factories.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
-import { $$type } from "https://deno.land/x/functional@v1.0.0/library/Symbols.js";
+import { $$type } from "https://deno.land/x/functional@v1.2.1/library/Symbols.js";
 
 /**
  * The `URL` type represents an URL; either of a location on the file system or on a remote server.
diff --git a/library/browser_safe.js b/library/browser_safe.js
index b3f41b1..33c0442 100644
--- a/library/browser_safe.js
+++ b/library/browser_safe.js
@@ -1,6 +1,6 @@
 import { apply, lift } from "https://x.nest.land/ramda@0.27.0/source/index.js";
 
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 
 import Request from "./Request.js";
 import Response from "./Response.js";
diff --git a/library/browser_safe_test.js b/library/browser_safe_test.js
index d908e6e..d1dd8e7 100644
--- a/library/browser_safe_test.js
+++ b/library/browser_safe_test.js
@@ -1,9 +1,9 @@
-import { assert } from "https://deno.land/std@0.70.0/testing/asserts.ts";
-import { serve } from "https://deno.land/std@0.74.0/http/server.ts";
+import { assert } from "https://deno.land/std@0.79.0/testing/asserts.ts";
+import { serve } from "https://deno.land/std@0.79.0/http/server.ts";
 import { fetch } from "./browser_safe.js";
 
-import Either from "https://deno.land/x/functional@v1.0.0/library/Either.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js";
+import Either from "https://deno.land/x/functional@v1.2.1/library/Either.js";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js";
 import Request from "./Request.js";
 
 const startAsyncIterator = async (state, server, callback) => {
diff --git a/library/fs.js b/library/fs.js
index b1e9e9a..91ab770 100644
--- a/library/fs.js
+++ b/library/fs.js
@@ -4,15 +4,15 @@ import {
   ensureSymlink as _ensureSymlink,
   exists as _exists,
   move as _move
-} from "https://deno.land/std@0.70.0/fs/mod.ts";
-import { curry } from "https://x.nest.land/ramda@0.27.0/source/index.js";
-import Either from "https://deno.land/x/functional@v1.0.0/library/Either.js"
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js"
+} from "https://deno.land/std@0.79.0/fs/mod.ts";
+import { compose, curry } from "https://x.nest.land/ramda@0.27.0/source/index.js";
+import Either from "https://deno.land/x/functional@v1.2.1/library/Either.js"
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js"
 import Buffer from "./Buffer.js";
 import Directory from "./Directory.js";
 import File from "./File.js";
 import Resource from "./Resource.js";
-import { coerceAsReader, coerceAsWriter } from "./utilities.js";
+import { coerceAsReader, coerceAsWriter, factorizeUint8Array } from "./utilities.js";
 
 // chdir :: Directory a -> Task e Directory a
 export const chdir = directory => Directory.isOrThrow(directory)
@@ -32,10 +32,10 @@ export const chown = curry(
       .map(_ => File(file.path, file.raw, file.rid))
 );
 
-// close :: File a -> Task e File a
-export const close = file => File.isOrThrow(file)
-  && Task.wrap(_ => Deno.close(file.rid) || Promise.resolve(undefined))
-    .map(_ => File(file.path, file.raw, file.rid));
+// close :: Resource a -> Task e Resource a
+export const close = resource => Resource.isOrThrow(resource)
+  && Task.wrap(_ => Deno.close(resource.rid) || Promise.resolve(undefined))
+    .map(_ => resource.constructor.from({ ...resource }));
 
 // copy :: Options -> Buffer a -> Buffer b -> Task e Buffer a
 export const copy = curry(
@@ -75,18 +75,18 @@ export const ensureSymlink = directory => Directory.isOrThrow(directory)
   && Task.wrap(_ => _ensureSymlink(directory.path))
   .map(_ => Directory(directory.path));
 
-// exists :: Location a -> Task null Location a
-export const exists = location => {
-  if (!Directory.is(location) && !File.is(location)) {
-    throw new Error(`Expected a Directory or a File but got a "${typeof location}"`);
+// exists :: URL a -> Task null URL a
+export const exists = url => {
+  if (!Directory.is(url) && !File.is(url)) {
+    throw new Error(`Expected a Directory or a File but got a "${typeof url}"`);
   }
 
-  return Task.wrap(_ => _exists(location.path))
+  return Task.wrap(_ => _exists(url.path))
     .map(
       fileExists => {
         if (!fileExists) return Either.Left(null);
 
-        return location.constructor.from({ ...location });
+        return url.constructor.from({ ...url });
       }
     )
 };
@@ -98,11 +98,11 @@ export const mkdir = curry(
       .map(_ => Directory(directory.path))
 );
 
-// move :: Options -> String -> Location a -> Task e Location b
+// move :: Options -> String -> URL a -> Task e URL b
 export const move = curry(
-  (options, destinationPath, location) => location.hasOwnProperty("path")
-    && Task.wrap(_ => _move(location.path, destinationPath))
-    .map(_ => location.constructor.from({ ...location, path: destinationPath }))
+  (options, destinationPath, url) => url.hasOwnProperty("path")
+    && Task.wrap(_ => _move(url.path, destinationPath))
+    .map(_ => url.constructor.from({ ...url, path: destinationPath }))
 );
 
 // open :: Options -> File a -> Task e File a
@@ -121,6 +121,34 @@ export const read = resource => {
       .map(_ => resource.constructor.from({ ...resource, raw: _buffer }))
 };
 
+// readLine :: Resource a -> Task e Resource a
+export const readLine = resource => Task.wrap(async _ => {
+  let _accumulatorBuffer = new Uint8Array(1024);
+  let index = 0;
+  let _buffer = new Uint8Array(1);
+  let reachedCL = false;
+
+  while (await Deno.read(resource.rid, _buffer)) {
+    _accumulatorBuffer[index++] = _buffer[0];
+    if (reachedCL && _buffer[0] === 10) break;
+    reachedCL = _buffer[0] === 13;
+    _buffer = new Uint8Array(1);
+  }
+
+  return resource.constructor.from({ ...resource, raw: _accumulatorBuffer.slice(0, index) });
+});
+
+// readNBytes :: Number -> Resource a -> Task e Resource a
+export const readNBytes = curry(
+  compose(
+    read,
+    (n, resource) => resource.constructor.from({ ...resource, raw: factorizeUint8Array(n) })
+  )
+);
+
+// readOneByte :: Resource a -> Task e Resource a
+export const readOneByte = readNBytes(1);
+
 // readAll :: Resource a -> Task e Resource a
 export const readAll = resource => Resource.isOrThrow(resource)
   && Task.wrap(_ => Deno.readAll(coerceAsReader(resource)))
@@ -131,18 +159,18 @@ export const readFile = file => File.isOrThrow(file)
   && Task.wrap(_ => Deno.readFile(file.path))
     .map(_buffer => File(file.path, _buffer, file.rid));
 
-// remove :: Options -> Location a -> Task e Location a
+// remove :: Options -> URL a -> Task e URL a
 export const remove = curry(
-  (options, location) => location.hasOwnProperty("path")
-    && Task.wrap(_ => Deno.remove(location.path, options))
-      .map(_ => location.constructor.from({ ...location }))
+  (options, url) => url.hasOwnProperty("path")
+    && Task.wrap(_ => Deno.remove(url.path, options))
+      .map(_ => url.constructor.from({ ...url }))
 );
 
-// rename :: String -> Location a -> Task e Location b
+// rename :: String -> URL a -> Task e URL b
 export const rename = curry(
-  (destinationPath, location) => location.hasOwnProperty("path")
-    && Task.wrap(_ => Deno.rename(location.path, destinationPath))
-      .map(_ => location.constructor.from({ ...location, path: destinationPath }))
+  (destinationPath, url) => url.hasOwnProperty("path")
+    && Task.wrap(_ => Deno.rename(url.path, destinationPath))
+      .map(_ => url.constructor.from({ ...url, path: destinationPath }))
 );
 
 // write :: Resource a -> Task e Resource a
@@ -164,3 +192,4 @@ export const writeFile = curry(
     && Task.wrap(_ => Deno.writeFile(file.path, file.raw, options))
       .map(_ => file.constructor.from({ ...file }))
 );
+
diff --git a/library/fs_test.js b/library/fs_test.js
index 1e5f7c8..b02d987 100644
--- a/library/fs_test.js
+++ b/library/fs_test.js
@@ -12,13 +12,13 @@ import {
   replace,
   trim
 } from "https://x.nest.land/ramda@0.27.0/source/index.js";
-import { assert, assertEquals } from "https://deno.land/std@0.70.0/testing/asserts.ts";
+import { assert, assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 import {
   emptyDir as _emptyDir,
   ensureDir as _ensureDir
-} from "https://deno.land/std@0.70.0/fs/mod.ts";
-import Either from "https://deno.land/x/functional@v1.0.0/library/Either.js"
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task.js"
+} from "https://deno.land/std@0.79.0/fs/mod.ts";
+import Either from "https://deno.land/x/functional@v1.2.1/library/Either.js"
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task.js"
 import {
   chdir,
   chmod,
@@ -37,6 +37,7 @@ import {
   read,
   readAll,
   readFile,
+  readNBytes,
   remove,
   rename,
   write,
@@ -47,7 +48,7 @@ import Buffer from "./Buffer.js";
 import Directory from "./Directory.js";
 import File from "./File.js";
 
-import { $$value } from "https://deno.land/x/functional@v1.0.0/library/Symbols.js";
+import { $$value } from "https://deno.land/x/functional@v1.2.1/library/Symbols.js";
 
 Deno.test(
   "Integration: chdir",
@@ -515,6 +516,32 @@ Deno.test(
   }
 );
 
+Deno.test(
+  "Integration: readNBytes",
+  async () => {
+    await _ensureDir(`${Deno.cwd()}/dump`);
+    await Deno.writeTextFile(`${Deno.cwd()}/dump/hoge`, "ABCDE");
+    const _file = await Deno.open(`${Deno.cwd()}/dump/hoge`, { read: true, write: true });
+
+    const containerA = readNBytes(5, File(`${Deno.cwd()}/dump/hoge`, new Uint8Array([]), _file.rid));
+    const promise = containerA.run();
+
+    assert(Task.is(containerA));
+    assert(promise instanceof Promise);
+
+    const containerB = await promise;
+
+    assert(Either.Right.is(containerB));
+    assertEquals(
+      containerB.toString(),
+      `Either.Right(File("${Deno.cwd()}/dump/hoge", 65,66,67,68,69, ${_file.rid}))`
+    );
+
+    await Deno.remove(`${Deno.cwd()}/dump/hoge`);
+    Deno.close(_file.rid);
+  }
+);
+
 Deno.test(
   "Integration: readFile",
   async () => {
diff --git a/library/network.js b/library/network.js
index dae82ab..1aa6f1d 100644
--- a/library/network.js
+++ b/library/network.js
@@ -1,5 +1,5 @@
 import { Connection } from "./Resource.js";
-import Task from "https://deno.land/x/functional@v1.0.0/library/Task";
+import Task from "https://deno.land/x/functional@v1.2.1/library/Task";
 
 // connect :: Connection a -> Task e Connection a
 export const connect = connection => Connection.isOrThrow(connection)
diff --git a/library/utilities.js b/library/utilities.js
index 84454ae..ffc4fee 100644
--- a/library/utilities.js
+++ b/library/utilities.js
@@ -1,3 +1,81 @@
+import {
+  __,
+  always,
+  ap,
+  compose,
+  flip,
+  gte,
+  ifElse,
+  map,
+  prop,
+  reduce,
+  slice,
+  subtract,
+} from "https://x.nest.land/ramda@0.27.0/source/index.js";
+
+import Pair from "https://deno.land/x/functional@v1.2.1/library/Pair.js";
+
+const CHARACTER_CODE_CL = "\r".charCodeAt(0);
+const CHARACTER_CODE_RF = "\n".charCodeAt(0);
+
+const $$decoder = new TextDecoder();
+const $$encoder = new TextEncoder();
+
+export const decodeRaw = $$decoder.decode.bind($$decoder);
+export const encodeText = $$encoder.encode.bind($$encoder);
+
+// findCLRFIndex :: Uint8Array -> Number
+export const findCLRFIndex = compose(
+  prop("second"),
+  reduce(
+    ({ first: index, second: cursor }, characterCode) =>
+      index === -1 && Pair(index, cursor)
+      || (
+        characterCode === CHARACTER_CODE_CL && cursor === -1
+          ? Pair(index + 1, index)
+          : characterCode === CHARACTER_CODE_RF && cursor !== -1
+          ? Pair(-1, index + 1)
+          : Pair(index + 1, -1)
+      ),
+    Pair(0, -1)
+  )
+);
+
+export const discardFirstLine = ap(flip(slice(__, Infinity)), findCLRFIndex);
+
+export const discardNCharacter = slice(__, Infinity);
+
+export const getFirstLine = ap(flip(slice(0)), findCLRFIndex);
+
+export const joinCLRF = reduce(
+  (accumulator, _buffer) => new Uint8Array([ ...accumulator, 13, 10, ..._buffer ]),
+  new Uint8Array([])
+);
+
+// splitCLRF :: Uint8Array -> Uint8Array[]
+export const splitCLRF = characterCodeList => {
+  const accumulator = [];
+  let remainingCharacterCodeList = characterCodeList;
+
+  while (true) {
+    if (remainingCharacterCodeList.length === 0) break;
+    const index = findCLRFIndex(remainingCharacterCodeList);
+    accumulator.push(
+      remainingCharacterCodeList.slice(0, index === -1 ? remainingCharacterCodeList.length : index)
+    );
+    if (index === -1) break;
+    remainingCharacterCodeList = remainingCharacterCodeList.slice(index, remainingCharacterCodeList.length);
+  }
+
+  return accumulator;
+};
+
+// mapBuffer :: Buffer -> (String -> String) -> Buffer
+export const mapBuffer = unaryFunction => map(compose(encodeText, unaryFunction, decodeRaw));
+
+// trimCRLF :: Uint8Array -> Uint8Array
+export const trimCRLF = ap(flip(slice(0)), compose(ifElse(flip(gte)(0), subtract(__, 2), always(Infinity)), findCLRFIndex));
+
 export const coerceAsReader = resource => {
 
   return {
@@ -31,4 +109,6 @@ export const coerceAsWriter = resource => {
     },
     ...resource
   };
-};
\ No newline at end of file
+};
+
+export const factorizeUint8Array = x => new Uint8Array(x);
diff --git a/library/utilities_test.js b/library/utilities_test.js
index b35f482..bf610da 100644
--- a/library/utilities_test.js
+++ b/library/utilities_test.js
@@ -1,7 +1,7 @@
-import { assertEquals } from "https://deno.land/std@0.70.0/testing/asserts.ts";
+import { assertEquals } from "https://deno.land/std@0.79.0/testing/asserts.ts";
 
 import Buffer from "./Buffer.js";
-import { coerceAsReader, coerceAsWriter } from "./utilities.js";
+import { coerceAsReader, coerceAsWriter, findCLRFIndex, splitCLRF, trimCRLF } from "./utilities.js";
 
 Deno.test(
   "coerceAsReader",
@@ -123,4 +123,78 @@ Deno.test(
     assertEquals(promiseG, Promise.resolve(5));
     assertEquals(promiseH, Promise.resolve(5));
   }
-);
\ No newline at end of file
+);
+
+Deno.test(
+  "findCLRFIndex",
+  () => {
+    assertEquals(
+      findCLRFIndex(new Uint8Array([ 104, 111, 103, 101, 13, 10 ])),
+      6
+    );
+
+    assertEquals(
+      findCLRFIndex(new Uint8Array([ 104, 111, 103, 101, 13, 10, 104, 111, 103, 101, 13, 10 ])),
+      6
+    );
+
+    assertEquals(
+      findCLRFIndex(new Uint8Array([ 104, 111, 103, 101, 13, 104, 111, 103, 101 ])),
+      -1
+    );
+
+    assertEquals(
+      findCLRFIndex(new Uint8Array([ 104, 111, 103, 101, 10, 104, 111, 103, 101 ])),
+      -1
+    );
+  }
+);
+
+Deno.test(
+  "splitCLRF",
+  () => {
+    assertEquals(
+      splitCLRF(new Uint8Array([ 104, 111, 103, 101, 13, 10 ])),
+      [
+        new Uint8Array([ 104, 111, 103, 101, 13, 10 ])
+      ]
+    );
+
+    assertEquals(
+      splitCLRF(new Uint8Array([ 104, 111, 103, 101, 13, 10, 104, 111, 103, 101, 13, 10 ])),
+      [
+        new Uint8Array([ 104, 111, 103, 101, 13, 10 ]),
+        new Uint8Array([ 104, 111, 103, 101, 13, 10 ])
+      ]
+    );
+
+    assertEquals(
+      splitCLRF(new Uint8Array([ 104, 111, 103, 101, 13, 104, 111, 103, 101 ])),
+      [
+        new Uint8Array([ 104, 111, 103, 101, 13, 104, 111, 103, 101 ])
+      ]
+    );
+
+    assertEquals(
+      splitCLRF(new Uint8Array([ 104, 111, 103, 101, 10, 104, 111, 103, 101 ])),
+      [
+        new Uint8Array([ 104, 111, 103, 101, 10, 104, 111, 103, 101 ])
+      ]
+    );
+  }
+);
+
+Deno.test(
+  "trimCRLF",
+  () => {
+    assertEquals(
+      trimCRLF(new Uint8Array([ 104, 111, 103, 101, 13, 10 ])),
+      new Uint8Array([ 104, 111, 103, 101 ])
+    );
+
+    assertEquals(
+      trimCRLF(new Uint8Array([ 104, 111, 103, 101 ])),
+      new Uint8Array([ 104, 111, 103, 101 ])
+    );
+  }
+);
diff --git a/scratch.js b/scratch.js
deleted file mode 100644
index f210fad..0000000
--- a/scratch.js
+++ /dev/null
@@ -1,7 +0,0 @@
-import { serve } from "https://deno.land/std@0.70.0/http/server.ts";
-const server = serve({ port:8000 });
-console.debug("FU")
-
-for await (const request of server) {
-  request.respond({ body: "hello world" });
-}
\ No newline at end of file